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Add info about the output of 'shorewall show tc'

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8334 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2008-03-22 15:20:58 +00:00
parent 942d6bf6f5
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docs/traffic_shaping.xml
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@ -1171,10 +1171,6 @@ ip link set ifb0 up</command></programlisting>
tcrules file, the last match determines the classification.</para>
</listitem>
<listitem>
<para>IP ranges are not supported</para>
</listitem>
<listitem>
<para>ipsets are not supported</para>
</listitem>
@ -1441,6 +1437,96 @@ filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800:</emphasis
</section>
</section>
<section id="show">
<title>Understanding the output of 'shorewall show tc'</title>
<para>The <command>shorewall show tc</command> (<command>shorewall-lite
show tc</command>) command displays information about the current state of
traffic shaping. For each device, it executes the following
commands:</para>
<programlisting> echo Device $device:
tc -s -d qdisc show dev $device
echo
tc -s -d class show dev $device
echo </programlisting>
<para>So, the traffic-shaping output is generated entirely by the
<command>tc</command> utility.</para>
<para>Here's the output of for eth0. The configuration is the one shown in
the preceding section (the output was obtained almost 24 hours later than
the <command>shorewall show filters</command> output shown above).</para>
<programlisting>Device eth0:
<emphasis role="bold"> ============== The primary queuing discipline is HTB (Hierarchical Token Bucket) ==================== </emphasis>
qdisc htb 1: r2q 10 default 120 direct_packets_stat 9 ver 3.17
Sent 2133336743 bytes 4484781 pkt (dropped 198, overlimits 4911403 requeues 21) <emphasis
role="bold">&lt;=========== Note the overlimits and dropped counts</emphasis>
rate 0bit 0pps backlog 0b 8p requeues 21
<emphasis role="bold">============== The ingress filter. If you specify IN-BANDWIDTH, you can see the 'dropped' count here. =========</emphasis>
<emphasis role="bold">In this case, the packets are being sent to the IFB for shaping</emphasis>
qdisc ingress ffff: ----------------
Sent 4069015112 bytes 4997252 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
<emphasis role="bold">============ Each of the leaf HTB classes has an SFQ qdisc to ensure that each flow gets its turn ============</emphasis>
qdisc sfq 110: parent 1:110 limit 128p quantum 1514b flows 128/1024 perturb 10sec
Sent 613372519 bytes 2870225 pkt (dropped 0, overlimits 0 requeues 6)
rate 0bit 0pps backlog 0b 0p requeues 6
qdisc sfq 120: parent 1:120 limit 128p quantum 1514b flows 128/1024 perturb 10sec
Sent 18434920 bytes 60961 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 130: parent 1:130 limit 128p quantum 1514b flows 128/1024 perturb 10sec
Sent 1501528722 bytes 1553586 pkt (dropped 198, overlimits 0 requeues 15)
rate 0bit 0pps backlog 11706b 8p requeues 15
<emphasis role="bold">============= Class 1:110 -- the high-priority class ===========
Note the rate and ceiling calculated from 'full'</emphasis>
class htb 1:110 parent 1:1 leaf 110: prio 1 quantum 4800 <emphasis role="bold">rate 192000bit ceil 384000bit</emphasis> burst 1695b/8 mpu 0b overhead 0b cburst 1791b/8 mpu 0b overhead 0b level 0
Sent 613372519 bytes 2870225 pkt (dropped 0, overlimits 0 requeues 0)
<emphasis role="bold">rate 195672bit 28pps backlog 0b 0p</emphasis> requeues 0 <emphasis
role="bold">&lt;=========== Note the current rate of traffic. There is no queuing (no packet backlog)</emphasis>
lended: 2758458 borrowed: 111773 giants:
tokens: 46263 ctokens: 35157
<emphasis role="bold">============== The root class ============</emphasis>
class htb 1:1 root rate 384000bit ceil 384000bit burst 1791b/8 mpu 0b overhead 0b cburst 1791b/8 mpu 0b overhead 0b level 7
Sent 2133276316 bytes 4484785 pkt (dropped 0, overlimits 0 requeues 0)
rate 363240bit 45pps backlog 0b 0p requeues 0
lended: 1081936 borrowed: 0 giants: 0
tokens: -52226 ctokens: -52226
<emphasis role="bold">============= Bulk Class (outgoing rsync, email and bittorrent) ============</emphasis>
class htb 1:130 parent 1:1 leaf 130: prio 3 quantum 1900 rate 76000bit ceil 230000bit burst 1637b/8 mpu 0b overhead 0b cburst 1714b/8 mpu 0b overhead 0b level 0
Sent 1501528722 bytes 1553586 pkt (dropped 198, overlimits 0 requeues 0)
<emphasis role="bold">rate 162528bit 14pps backlog 0b 8p</emphasis> requeues 0 <emphasis
role="bold">&lt;======== Queuing is occurring (8 packet backlog). The rate is still below the ceiling.</emphasis>
lended: 587134 borrowed: 966459 giants: 0 <emphasis role="bold">During peak activity, the rate tops out at around 231000 (just above ceiling).</emphasis>
tokens: -30919 ctokens: -97657
<emphasis role="bold">================= Default class (mostly serving web pages) ===============</emphasis>
class htb 1:120 parent 1:1 leaf 120: prio 2 quantum 1900 rate 76000bit ceil 230000bit burst 1637b/8 mpu 0b overhead 0b cburst 1714b/8 mpu 0b overhead 0b level 0
Sent 18434920 bytes 60961 pkt (dropped 0, overlimits 0 requeues 0)
rate 2240bit 2pps backlog 0b 0p requeues 0
lended: 57257 borrowed: 3704 giants: 0
tokens: 156045 ctokens: 54178
</programlisting>
</section>
<section id="External">
<title id="tcstart">Using your own tc script</title>